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When enabling a fixed regulator, it may take some time to rise to the correct voltage. If we do not delay here then subsequent operations will fail. Signed-off-by: John Keeping <john@metanate.com> Reviewed-by: Tom Rini <trini@konsulko.com> Reviewed-by: Simon Glass <sjg@chromium.org>
40 lines
1.1 KiB
Plaintext
40 lines
1.1 KiB
Plaintext
Fixed Voltage regulator
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Binding:
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The binding is done by the property "compatible" - this is different, than for
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binding by the node prefix (doc/device-tree-bindings/regulator/regulator.txt).
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Required properties:
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- compatible: "regulator-fixed"
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- regulator-name: this is required by the regulator uclass
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Optional properties:
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- gpio: GPIO to use for enable control
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- startup-delay-us: startup time in microseconds
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- regulator constraints (binding info: regulator.txt)
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Other kernel-style properties, are currently not used.
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Note:
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For the regulator constraints, driver expects that:
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- regulator-min-microvolt is equal to regulator-max-microvolt
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- regulator-min-microamp is equal to regulator-max-microamp
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Example:
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fixed_regulator@0 {
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/* Mandatory */
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compatible = "regulator-fixed";
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regulator-name = "LED_3.3V";
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/* Optional: */
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gpio = <&gpc1 0 GPIO_ACTIVE_LOW>;
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/* Optional for regulator uclass */
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regulator-min-microvolt = <3300000>;
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regulator-max-microvolt = <3300000>;
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regulator-min-microamp = <15000>;
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regulator-max-microamp = <15000>;
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regulator-always-on;
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regulator-boot-on;
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};
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